Daikin IOM 1322-1, Installation, Operation And Maintenance Manual

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IOM 1322-1 • WATER-COOLED SCROLL COMPRESSOR 6 www.DaikinApplied.com
Introduction and Installation
General Description
Daikin Applied WGZ water chillers are designed for indoor
installations Equipment room temperature for operating and
standby conditions is 40°F to 122°F (4.4°C to 50°C).
Each water-cooled unit is completely assembled and factory
wired before evacuation, charging and testing. They consist
of hermetic scroll compressors, brazed-plate evaporators on
Models WGZ 030 to 130 or shell-and-tube on Models WGZ
150 to 200, water-cooled condenser on Model WGZ-DW, and
complete refrigerant piping.
Liquid line components that are included are manual liquid line
shutoff valves, charging valves, filter-driers, liquid line solenoid
valves, sight glass/moisture indicators, and expansion valves.
Other features include compressor crankcase heaters, and a
MicroTech II microprocessor controller.
The electrical control center includes all equipment protection
and operating controls necessary for dependable automatic
operation. Optional unit-mounted disconnect switch(es) may
not be present, in which case a field-supplied and installed,
fused disconnect switch is required.
NOTE:
Information for Model TGZ Templifiers with R-134a
can be found in IOM 1319 at www.DaikinApplied.com.
Inspection
When the equipment is received, all items should be carefully
checked against the bill of lading to be sure of a complete
shipment. All units must be carefully inspected for damage
upon arrival. All shipping damage must be reported to the
carrier and a claim must be filed with the carrier. The unit
serial plate should be checked before unloading the unit to be
sure that it agrees with the power supply available. Physical
damage to unit after acceptance is not the responsibility of
Daikin Applied.
Refrigerant Charge
Every model WGZ-DW water chiller with water-cooled
condensers is shipped with a full refrigerant charge. For
shipment, the charge is contained in the condenser and
is isolated by the condenser liquid shutoff valve and the
compressor discharge valve common to a pair of compressors.
DANGER
If refrigerant leaks from the unit, there is a potential danger of suffocation
since refrigerant will displace the air in the immediate area. Be sure to
follow all applicable industry related published standards and local, state
and federal, statutes, regulations and codes if a refrigerant leak occurs.
Avoid exposing refrigerant to an open flame.
Installation
NOTE: Installation and maintenance are to be performed
only by qualified personnel who are familiar with local
codes and regulations, and experienced with this type
of equipment.
CAUTION
When around sharp edges, wear appropriate Personal Protective Equipment
(PPE), such as gloves, protective clothing, foot wear, eye protection etc. to
prevent personal injury.
Location
WGZ chillers are intended only for installation in an indoor or
weather protected area consistent with the NEMA 1 rating on
the chiller, controls, and electrical panels. Equipment room
temperature for operating and standby conditions is 40°F to
122°F (4.4°C to 50°C).
Because of the electrical control devices, the units should not
be exposed to the weather. A plastic cover over the control
box is supplied as temporary protection during shipment. A
reasonably level and sufficiently strong floor is required for
the water chiller. If necessary, additional structural members
should be provided to transfer the weight of the unit to the
nearest beams
Space Requirements for Connections
and Servicing
For brazed plate evaporators - the chilled water and condenser
water (on units with a water-cooled condenser) piping enters
and leaves the unit from the right side when looking at the